precision machining grinding. at kremin inc., we put the needs of our clients first. we pride ourselves on short lead times, fast turnarounds, and low cost without sacrificing quality. we continuously invest in the new computerized numerical control ( cnc) technology and the latest equipment to provide the precise product you need on time and,slim haney machining precision production screw machine,precision production screw machine / cnc component manufacturer. since 1962, slim haney machining in tulsa, ok has produced precision automatic screw machine products from brass, carbon steel, stainless, aluminum, and plastics up to 2 dia. turnkey operations available include plating, center-less grinding, heat-treating, milling, and thread rolling.